package cn.sumpu.app.guoguojie.web.util;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.Collection;
import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.swing.JOptionPane;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFClientAnchor;
import org.apache.poi.hssf.usermodel.HSSFComment;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPatriarch;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor;

import cn.sumpu.app.guoguojie.domain.Ext.AppActivityExt;

public class ExportExcel<T> {

	public void exportExcel(Collection<T> dataset, OutputStream out) {
		this.exportExcel("测试POI导出EXCEL文档", null, dataset, out, "yyyy-MM-dd");
	}

	public void exportExcel(String[] headers, Collection<T> dataset,
			OutputStream out) {
		this.exportExcel("测试POI导出EXCEL文档", headers, dataset, out, "yyyy-MM-dd");
	}

	public void exportExcep(String[] headers, Collection<T> dataset,
			OutputStream out, String patterm) {
		this.exportExcel("测试POI导出EXCEL文档", headers, dataset, out, patterm);
	}

	/**
	 * 这是一个通用的方法,利用了JAVA的反射机制,可以将放置在JAVA集合中并且符号一定条件的数据以EXCEL的形式输出到指定IO设备上
	 * 
	 * @param title
	 *            表格标题名
	 * @param headers
	 *            表格属性列名数组
	 * @param dataset
	 *            需要显示的数据集合，集合中一定要放置符合javabean风格的类的对象。此方法支持的
	 *            javabean属性的数据类型有基本数据类型以String,Date,byte[](图片数据)
	 * @param out
	 *            与输出设备关联的流对象，可以将EXCEL文档导出到本地文件或者网络中
	 * @param pattem
	 *            如果有时间数据，设定输出格式。默认为"yyyy-MM-dd";
	 */
	public void exportExcel(String title, String[] headers,
			Collection<T> dataset, OutputStream out, String pattem) {
		// 声明一个工作簿
		HSSFWorkbook workbook = new HSSFWorkbook();
		// 生成一个表格
		HSSFSheet sheet = workbook.createSheet(title);
		// 设置表格默认列宽度为15个字节
		sheet.setDefaultColumnWidth(15);
		// 生成一个样式(用于单元格)
		HSSFCellStyle style = workbook.createCellStyle();
		style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
		style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
		style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
		style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
		style.setBorderRight(HSSFCellStyle.BORDER_THIN);
		style.setBorderTop(HSSFCellStyle.BORDER_THIN);
		style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		// 生成一个字体(用于单元格)
		HSSFFont font = workbook.createFont();
		font.setColor(HSSFColor.VIOLET.index);
		font.setFontHeightInPoints((short) 12);
		font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
		// 把字体应用到当前的样式
		style.setFont(font);
		// 生成并设置另一个样式
		HSSFCellStyle style2 = workbook.createCellStyle();
		style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
		style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
		style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
		style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
		style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
		style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
		style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
		// 生成另一个字体
		HSSFFont font2 = workbook.createFont();
		font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
		// 把字体应用到当前的样式
		style2.setFont(font2);

		// 声明一个画图的顶级管理器
		HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
		// 定义注释的大小和位置,详见文档
		HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0,
				0, 0, 0, (short) 4, 2, (short) 6, 5));
		// 设置注释内容
		comment.setString(new HSSFRichTextString("可以在POI中添加注释!"));
		// 设置注释作者,当鼠标移动单单元格上是可以在状态栏中看到该内容。
		comment.setAuthor("wuhaidong");

		// 产生表格标题行
		HSSFRow row = sheet.createRow(0);
		for (int i = 0; i < headers.length; i++) {
			HSSFCell cell = row.createCell(i);
			cell.setCellStyle(style);// 设置单元格样式(包含字体)
			HSSFRichTextString text = new HSSFRichTextString(headers[i]);
			cell.setCellValue(text);// 把数据放到单元格中
		}

		// 遍历集合数据,产生数据行
		Iterator<T> it = dataset.iterator();
		int index = 0;
		while (it.hasNext()) {
			index++;
			row = sheet.createRow(index);
			T t = (T) it.next();
			// 利用反射，根据javabean属性的先后顺序，动态的调用getXxx()方法得到属性值
			Field[] fields = t.getClass().getDeclaredFields();
			for (int i = 0; i < fields.length; i++) {
				HSSFCell cell = row.createCell(i);
				cell.setCellStyle(style2);
				Field field = fields[i];
				String fieldName = field.getName();
				String getMethodName = "get"
						+ fieldName.substring(0, 1).toUpperCase()
						+ fieldName.substring(1);
				Class tCls = t.getClass();
				try {
					Method getMethod = tCls.getMethod(getMethodName,
							new Class[] {});
					Object value = getMethod.invoke(t, new Object[] {});
					// 判断值的类型后进行强制类型转换
					String textValue = null;
					/*
					 * if(value instanceof Integer){ Integer intValue =
					 * (Integer)value; cell.setCellValue(intValue); }else
					 * if(value instanceof Float){ Float floatValue =
					 * (Float)value; cell.setCellValue(floatValue); }else
					 * if(value instanceof Double){ Double doubleValue =
					 * (Double)value; cell.setCellValue(doubleValue); }else
					 * if(value instanceof Long){ Long longValue = (Long)value;
					 * cell.setCellValue(longValue); }else
					 */
					if (value instanceof Boolean) {
						boolean booleanValue = (Boolean) value;
						textValue = "男";
						if (!booleanValue) {
							textValue = "女";
						}
						cell.setCellValue(textValue);
					} else if (value instanceof Date) {
						Date date = (Date) value;
						SimpleDateFormat sdf = new SimpleDateFormat(pattem);
						textValue = sdf.format(date);
						cell.setCellValue(textValue);
					} else if (value instanceof byte[]) {
						// 有图片时,设置行高为60px;
						row.setHeightInPoints(60);
						// 设置有图片所在列宽度为80px,注意这里单位的一个换算
						sheet.setColumnWidth(i, (short) (35.7 * 80));
						// sheet.autoSizeColumn(i);
						byte[] bsValue = (byte[]) value;
						HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0,
								1023, 55, (short) 6, index, (short) 6, index);
						anchor.setAnchorType(2);
						patriarch.createPicture(anchor, workbook.addPicture(
								bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
					} else {
						// 其它数据类型都当做字符串简单处理
						textValue = value.toString();
					}
					// 如果不是图片数据,就利用正则表达式判断textValue是否全部由数字组成
					if (textValue != null) {
						Pattern p = Pattern.compile("^\\d+(\\.\\d+)?$");
						Matcher matcher = p.matcher(textValue);
						if (matcher.matches()) {
							// 是数字当作double处理
							cell.setCellValue(Double.parseDouble(textValue));
						} else {
							HSSFRichTextString richString = new HSSFRichTextString(
									textValue);
							HSSFFont font3 = workbook.createFont();
							font3.setColor(HSSFColor.BLUE.index);
							richString.applyFont(font3);
							cell.setCellValue(richString);
						}
					}
				} catch (SecurityException e) {
					e.printStackTrace();
				} catch (NoSuchMethodException e) {
					e.printStackTrace();
				} catch (IllegalArgumentException e) {
					e.printStackTrace();
				} catch (IllegalAccessException e) {
					e.printStackTrace();
				} catch (InvocationTargetException e) {
					e.printStackTrace();
				} finally {
					// 关闭资源
				}
			}
		}
		try {
			workbook.write(out);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

//	public static void main(String[] args) {
//		ExportExcel<AppActivityExt> exportExcel = new ExportExcel<AppActivityExt>();
//
//		String[] headers = new String[] { "参与家庭/人数", "现居地区", "联系手机" };
//		AppActivityExt a1 = new AppActivityExt();
//		a1.setNickName("a");
//		a1.setUserName("1");
//		a1.setMobilePhone("123123123");
//		AppActivityExt a2 = new AppActivityExt();
//		a2.setUserName("2");
//		a2.setNickName("b");
//		a2.setMobilePhone("2222222");
//		AppActivityExt a3 = new AppActivityExt();
//		a3.setUserName("3");
//		a3.setNickName("c");
//		a3.setMobilePhone("333333");
//		List<AppActivityExt> AppActivityExtList = new ArrayList<AppActivityExt>();
//		AppActivityExtList.add(a1);
//		AppActivityExtList.add(a2);
//		AppActivityExtList.add(a3);
//
//		FileOutputStream out = null;
//		try {
//			out = new FileOutputStream("/home/grieous/报名名单.xls");
//			exportExcel.exportExcep(headers, AppActivityExtList, out, "yyyy-MM-dd");
//			JOptionPane.showMessageDialog(null, "导出成功");
//			System.out.println("EXCEL导出成功!");
//		} catch (FileNotFoundException e) {
//			e.printStackTrace();
//		} finally {
//			if (null != out) {
//				try {
//					out.close();
//				} catch (IOException e) {
//					e.printStackTrace();
//				}
//			}
//		}
//	}

}
